Truck-bolster.



PATENTED JULY 28. 190s.-

C. VANDERBILT.

TRUCK BOLSTER.

APPLICATION nun JUNE 4. 1902.

H0 MODEL.

Wig-Tl.

WITNESSES INVENTOR fir/rz/z'w Va /10 221271; BY

' ATTORNEY in: uonms Pmns c0. mom-undo" WASHINGTON, 04 c.

' UNITED STATES Patented July 28, 1.903.

FFICE.

ATENT TRUCK-BOLSTER.

SPECIFICATION forming part of Letters Patent N 0. 734,637, dated July 28, 1903.

Application filed June 4, 1992. Serial'No; 110,139. (No model.'- i

To all, whom, it may concern:

Be it known that I, CORNELIUS VANDER- BILT, a citizen of the United States, and a resident of the borough ofManhattan, city and State of New York, have invented certain new and useful Improvements in Truck-Bolsters, of which the following is a specificalength. This feature makes it a staticallyoonstructed bolster or beam of uniform strength. I

Certain of the advantages possessed by the bolster herein shown can be obtained by a bolster which is constructed of one or more elevation,- of one form of bolster embodying my invention.

The bolster shown in the drawings is a hollow beam composed of a top web 4, a bottom web 5, and front and rear walls 9, uniting said webs. The center bearing 1 and side bearings 2 are preferably integral with the top web 4., and the column-guides 3 are integral with the walls 9. i The top and bottom webs taper, their widthsdiminishing from center to ends. The walls 9 also taperfrom the center to the ends, as shown. The bolster therefore diminishes both-in width andin depth from its center toward its ends. Its strength therefore is greatest at the center, where the stresses are greatest, and its strength at each point along its length is approximately proportional to the stresses which are to be borne at such point.

By this construction a considerable economy is obtained in the manufacturing cost of the bolster, and at the same time a bolster is produced of light weight without sacrificing necessary strength.

It will be observed that the upper andlo'wer webs form continuous walls of metal throughout the length and width of the bolster, thus imparting great lateral or transverse stiifness thereto.

The ends of the bolster are open, as shown. I also preferably provide the apertures or openings 10 and 14 in the walls 9, thereby lessening the weight of the bolster and at the same time providing for the easy removal of the core in case the bolster is made of cast metal. The walls 9 are continuous and unbroken at their centers, the parts 11: performing the function of struts between the upper and lower webs I and 5 and also giving the bolster greatest strength at its center, where the stresses are greatest. The ends of the lower web 5 are turned down to form transverse flanges 7, and the web is also provided with the transverse ribs or flanges 15. The front and rear walls 9 9 preferably extend the entire length of the bolster and unite with the flanges 7 and 15 to form the spring seat recesses or pockets 8. I prefer to strengthen the center portion of the bolster by means of vertical portions or braces 12 and 13, which unite and brace the webs and walls of the bolster in a very compact manner.

What I claim, and desire to secure by Letters Patent, is--- 1. A truck-bolster comprising upper and lower webs, said lower web having integral transverse, downwardly-extending flanges at each end, forming spring seat-pockets, substantially as described.

. 2. A truck-bolster comprising a hollow beam whose bottom wall is provided with integral, transverse, downwardlyextending flanges at each end, forming spring'seat-pockets, substantially as described.

3. A truck-bolster comprising upper and lower webs, said lower web having transverse, downwardly-extending flanges at each end, and front and rear walls extending from the ing spring seat-pockets, substantially as described.

6. A truck-bolster comprising top and bottom Webs, and front and rear walls, the center portion of said bolster having the brace 12 extending transversely, and the brace 13 extending longitudinally, substantially as described.

In witness whereof I have hereunto signed my name this 17th day of April, 1902.

CORNELIUS VANDERBILT.

In presence of Lotus A. SHEPARD, WILLIAM K. AUCHINOLOSS. 

